I think you need to watch the WHOLE video. Your characterization is not representative of the soldier's comments.
I just listened to the whole thing again, and yes he does mention the morale of the troops is very high (contra Murtha and the DemocRats claims), still his comments were directed at Moran, not Murtha (though yes, Murtha was on the panel).
I agree that all the libs complaints are anti-American, trying to put Bush down for their own politics, however still, this particular exchange was not toward Murtha, it was toward (the even scummier) Moran.
I used to be a constituent of Moran, so I do know the guy is a total jerk & fraud and racist womanizer too.